题目内容

现况调查中可能发生的偏倚有()。

A. 选择性偏倚
B. 无应答偏倚
C. 幸存者偏倚
D. 测量偏倚
E. 以上都包括

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男性,50岁,糖尿病6年,发热3天,咳痰少量带血丝,肺部未闻及啰音,胸片示右肺上野及中野有密度较淡浸润影,似有透光区,血WBC9.2×109/L。下列检查哪项对诊断最有意义()

A. 血沉
B. 痰细菌培养
C. 痰抗酸杆菌检查
D. 血培养
E. 纤维支气管镜

出租汽车运价标准是由()确定。

You execute this command to drop the ITEM table, which has the primary key referred in the ORDERS table:SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE; Which two statements are true about theeffect of the command()

A. No flashback is possible to bring back the ITEM table.
B. The ORDERS table is dropped along with the ITEM table.
C. The dependent referential integrity constraints in the ORDERS table are disabled.
D. The dependent referential integrity constraints in the ORDERS table are removed.
E. The table definition of the ITEM table and associated indexes are placed in the recycle bi

关于血尿的描述,下列哪项错误()

A. 肾小球性血尿一般为无痛性全程血尿
B. 变形红细胞血尿为肾小管源性
C. DIC病人会出现血尿
D. 离心后尿沉渣镜检每高倍视野红细胞超过3个为血尿
E. 变形红细胞血尿为肾小球源性

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